It's a cruel cruel world out there. When you breed snakes be prepared to brain live pinkies to get stubborn feeders going. Or tear apart pinkies, or take just there heads to feed tiny neonates. Or smack a rat for a snake that will only take fresh killed. Or to feed a snake live prey. The ends justifies the means. As long as my snakes are fat and happy then so be it.
They are rats!!!! Circle of life man.
But as for your question, I seriously doubt that RodentPro employs a gimp that spends all day smacking rats and guinea pigs. So I think you are safe!!